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| Content Provider | PubMed Central |
|---|---|
| Author | Elcombe, C. R. Mitchell, A. M. |
| Abstract | The exposure of cultured rat hepatocytes to mono(2-ethylhexyl)phthalate (MEHP) for 72 hr resulted in marked induction of peroxisomal enzyme activity (beta-oxidation; cyanide-insensitive palmitoyl CoA oxidase) and concomitant increases in the number of peroxisomes. Similar treatment of cultured guinea pig, marmoset, or human hepatocytes revealed little or no effect of MEHP. In order to eliminate possible confounding influences of biotransformation, the proximate peroxisome proliferator(s) derived from MEHP have been identified. Using cultured hepatocytes these agents were found to be metabolite VI [mono(2-ethyl-5-oxohexyl) phthalate] and metabolite IX [mono(2-ethyl-5-hydroxyhexyl) phthalate]. The addition of these "active" metabolites to cultured guinea pig, marmoset, or human hepatocytes again revealed little effect upon peroxisomes or related enzyme activities (peroxisomal beta-oxidation or microsomal lauric acid hydroxylation). These studies demonstrate a marked species difference in the response of hepatocytes to MEHP-elicited peroxisome proliferation. Preliminary studies have also suggested that peroxisome proliferation due to MEHP may be due to an initial biochemical lesion of fatty acid metabolism. |
| Ending Page | 219 |
| Starting Page | 211 |
| File Format | |
| ISSN | 00916765 |
| Journal | Environmental Health Perspectives |
| Volume Number | 70 |
| Language | English |
| Publisher Date | 1986-12-01 |
| Access Restriction | Open |
| Subject Keyword | Research in Higher Education |
| Content Type | Text |
| Resource Type | Article |
| Subject | Health, Toxicology and Mutagenesis Public Health, Environmental and Occupational Health |
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